Method and system of deploying substance detection device functionality

Abstract

A method and a system of deploying an ignition interlock device (IID). The method comprises receiving a time series of breath alcohol content (BrAC) measurements that are unitarily sourced from a pre-identified user, each BrAC measurement of the time series including an alveolar breath component and an interferent breath component; estimating a dissipation rate of alcohol attributable to the pre-identified user in accordance with the time series of BrAC measurements; determining, responsive to estimating the dissipation rate of alcohol, at least a subset of the BrAC measurements as being based on the alveolar breath component but not the interferent breath component; and performing one of triggering and not triggering the IID into a lockout state based on the at least a subset of the BrAC measurements.

The invention claimed is: 
     
       1. A method of deploying a substance detection device, the method comprising:
 receiving an initial sample volume of breath from a user; 
 measuring a breath alcohol content (BrAC) of the initial sample volume of breath with an alcohol-sensing element of the substance detection device; 
 after measuring the BrAC of the initial sample volume of breath, receiving a subsequent sample volume of breath from the user; 
 measuring the BrAC of the subsequent sample volume of breath with the alcohol-sensing element of the substance detection device; 
 wherein the initial sample volume of breath and the subsequent sample volume of breath each comprise at least one of an alveolar breath component and an interferent breath component; 
 estimating a dissipation rate of alcohol between the initial sample volume of breath and the subsequent sample volume of breath; and 
 determining, responsive to estimating the dissipation rate of alcohol, at least a subset of the BrAC measurements as attributable to the alveolar breath component but not the interferent breath component. 
 
     
     
       2. The method of  claim 1 , wherein an alcohol dissipation rate attributable to the interferent breath component of the BrAC measurements exceeds a dissipation rate attributable to the alveolar breath component. 
     
     
       3. The method of  claim 2 , wherein the alcohol dissipation rate attributable to the interferent breath component exceeds 0.025 g/100 mL/hour, and the dissipation rate attributable to the alveolar breath component ranges from 0.015 to 0.025 g/100 mL/hour. 
     
     
       4. The method of  claim 1 , wherein the alveolar breath component is indicative of an alcohol ingestion event. 
     
     
       5. The method of  claim 1 , wherein the interferent breath component is indicative of a non-ingested alcohol event. 
     
     
       6. The method of  claim 1 , further comprising performing one of triggering and not triggering the substance detection device into a violation state based on the at least a subset of the BrAC measurements. 
     
     
       7. The method of  claim 6 , further comprising triggering the substance detection device into the violation state when the alveolar breath component of the at least a subset of the BrAC measurements indicates that a predetermined threshold of blood alcohol content is exceeded. 
     
     
       8. The method of  claim 6 , further comprising not triggering the substance detection device into the violation state when the alveolar breath component of the at least a subset of the BrAC measurements indicates that a predetermined threshold of blood alcohol content is not exceeded. 
     
     
       9. The method of  claim 1 , wherein the BrAC measurements comprise a series of BrAC measurements acquired from the user at measured time intervals. 
     
     
       10. The method of  claim 9 , wherein the measured time intervals comprise one of a regular duration and a random duration between at least a trio of successive BrAC measurements within the time series of BrAC measurements. 
     
     
       11. A computing system for deploying a substance detection device, the computing system comprising:
 a processor; 
 one or more memory resources storing a set of instructions, the instructions when executed in the processor causing operations comprising:
 receiving a initial sample volume of breath from a user; 
 measuring a breath alcohol content (BrAC) of the initial sample volume of breath with an alcohol-sensing element of the substance detection device; 
 after measuring the BrAC of the initial sample volume of breath, receiving a subsequent sample volume of breath from the user; 
 measuring the BrAC of the subsequent sample volume of breath with the alcohol-sensing element of the substance detection device; 
 wherein the initial sample volume of breath and the subsequent sample volume of breath comprise an alveolar breath component and an interferent breath component; 
 estimating a dissipation rate of alcohol between the initial sample volume of breath and the subsequent sample volume of breath; and 
 determining, responsive to estimating the dissipation rate of alcohol, at least a subset of the BrAC measurements as attributable to the alveolar breath component but not the interferent breath component. 
 
 
     
     
       12. The computing system of  claim 11 , wherein an alcohol dissipation rate attributable to the interferent breath component of the BrAC measurements exceeds a dissipation rate attributable to the alveolar breath component. 
     
     
       13. The computing system of  claim 12 , wherein the alcohol dissipation rate attributable to the interferent breath component exceeds 0.025 g/100 mL/hour, and the dissipation rate attributable to the alveolar breath component ranges from 0.015 to 0.025 g/100 mL/hour. 
     
     
       14. The computing system of  claim 11 , wherein the alveolar breath component is indicative of an alcohol ingestion event. 
     
     
       15. The computing system of  claim 11 , wherein the interferent breath component is indicative of a non-ingested alcohol event. 
     
     
       16. The method of  claim 11 , the operations further comprising performing one of triggering and not triggering the substance detection device into a violation state based on the at least a subset of the BrAC measurements. 
     
     
       17. The computing system of  claim 16 , further comprising instructions causing triggering the substance detection device into the violation state when the alveolar breath component of the at least a subset of the BrAC measurements indicates that a predetermined threshold of blood alcohol content is exceeded. 
     
     
       18. The computing system of  claim 16 , further comprising instructions causing not triggering the substance detection device into the violation state when the alveolar breath component of the at least a subset of the BrAC measurements indicates that a predetermined threshold of blood alcohol content is not exceeded. 
     
     
       19. The computing system of  claim 11 , wherein the BrAC measurements comprise a series of BrAC measurements acquired from the user at measured time intervals. 
     
     
       20. The method of  claim 1 , further comprising, generating at a display interface, one of a plurality likelihood indicators, wherein each likelihood indicator is indicative of whether the BrAC of the initial sample is a result of the alveolar breath component or the interferent breath component.